US Bridges

S280-CRYSTAL SP or over Whitman Way

Fair

San Mateo County, California · 04-SM-280-R20.22-SBR · Structure no. 35 0197K

Built
1967
58 years old
Condition
Fair
inspected July 2021
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
5,600
1998 count
Owner
State
State Highway Agency

About this bridge

S280-CRYSTAL SP or over Whitman Way is a concrete continuous box beam or girders - multiple carrying S280-CRYSTAL SP or over Whitman Way in San Mateo County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,600 vehicles a day, roughly 2% of them trucks, projected to reach 7,408 by 2038. The structure is 156 ft (47.6 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesS280-CRYSTAL SP or
CrossesWhitman Way
Location04-SM-280-R20.22-SBR
RouteInterstate 280
CountySan Mateo County
StateCalifornia
Coordinates37.61741, -122.42472
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length156 ft (47.6 m)
Longest span54 ft (16.6 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (1998)
Projected traffic7,408 by 2038
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S280-CRYSTAL SP or over Whitman Way built?

It was built in 1967, making it 58 years old in 2025.

What condition is S280-CRYSTAL SP or over Whitman Way in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2021.

How much traffic does S280-CRYSTAL SP or over Whitman Way carry?

About 5,600 vehicles per day (1998 count), of which roughly 2% are trucks.

How long is S280-CRYSTAL SP or over Whitman Way?

The structure is 156 ft (47.6 m) long with a longest span of 54 ft (16.6 m) and a deck 41 ft wide.

Who owns S280-CRYSTAL SP or over Whitman Way?

It is owned by the State Highway Agency.